RK3228H开发之新红外遥控器的适配
一、引言
在android中适配一个红外遥控器，除了驱动部分的适配，还需要转换编码，而编码的转换涉及到硬件原始编码、linux编码以及上层java的编码，这里简单说一下。
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二、适配新的红外遥控器
1、底层编码转换
只要涉及到dts文件
......
ir_key4 {
rockchip,usercode = <0x5347>;
rockchip,key_table =
<0xe8 KEY_ENTER>,
<0xfb KEY_BACK>,
<0xec KEY_UP>,
<0xeb KEY_DOWN>,
<0xea KEY_LEFT>,
<0xe9 KEY_RIGHT>,
<0xe7 KEY_VOLUMEUP>,
<0xe6 KEY_VOLUMEDOWN>,
// <0xad KEY_SEARCH>,
<0xe5 KEY_POWER>,
<0xa4 KEY_MUTE>,
<0xad KEY_MENU>,
<0xfc KEY_HOME>,
// <0xf9 0x191>,
// <0xf5 0x192>,
// <0xb3 388>,
<0x57 185>,
<0x56 186>,
<0xf7 KEY_1>,
<0xf6 KEY_2>,
<0xf5 KEY_3>,
<0xf4 KEY_4>,
<0xf3 KEY_5>,
<0xf2 KEY_6>,
<0xf1 KEY_7>,
<0xf0 KEY_8>,
<0xef KEY_9>,
<0xf8 KEY_0>,
<0x1F KEY_LAYOUT>,
// <0x20 KEY_PTZ>,
// <0x1e KEY_DEMO>,
<0xfa KEY_CALL>,
<0xf9 KEY_ENDCALL>,
// <0xfa KEY_CALL>,
// <0xf9 KEY_ENDCALL>,
<0xbc KEY_BACKSPACE>;
};
......
而用来填写这个关系表的数值，可以在android中打印出来
在android中输入如下命令
echo 1 > sys/module/rockchip_pwm_remotectl/parameters/code_print //打开
echo 0 > sys/module/rockchip_pwm_remotectl/parameters/code_print //关闭
在按下遥控器上的按键，会有如下打印
shell@c03:/ # [ 1604.358668] I[1: swapper/1: 0] USERCODE=0x5347
[ 1604.384983] I[1: swapper/1: 0] RMC_GETDATA=ea
[ 1604.978988] I[1: swapper/1: 0] USERCODE=0x5347
[ 1605.005263] I[1: swapper/1: 0] RMC_GETDATA=e9
[ 1605.404248] I[1: swapper/1: 0] USERCODE=0x5347
[ 1605.430567] I[1: swapper/1: 0] RMC_GETDATA=ec
[ 1605.808230] I[1: swapper/1: 0] USERCODE=0x5347
[ 1605.834547] I[1: swapper/1: 0] RMC_GETDATA=eb
[ 1606.197356] I[1: swapper/1: 0] USERCODE=0x5347
[ 1606.223649] I[1: swapper/1: 0] RMC_GETDATA=ea
[ 1606.608632] I[1: swapper/1: 0] USERCODE=0x5347
[ 1606.634924] I[1: swapper/1: 0] RMC_GETDATA=e9
分别匹配该遥控器的系统码及按键的原始编码
2、linux编码设置
include/dt-bindings/input/input.h
......
#define KEY_RESERVED 0
#define KEY_ESC 1
#define KEY_1 2
#define KEY_2 3
#define KEY_3 4
#define KEY_4 5
#define KEY_5 6
#define KEY_6 7
#define KEY_7 8
#define KEY_8 9
#define KEY_9 10
#define KEY_0 11
#define KEY_MINUS 12
#define KEY_EQUAL 13
#define KEY_BACKSPACE 14
#define KEY_TAB 15
#define KEY_Q 16
#define KEY_W 17
#define KEY_E 18
#define KEY_R 19
#define KEY_T 20
#define KEY_Y 21
#define KEY_U 22
#define KEY_I 23
#define KEY_O 24
#define KEY_P 25
......
3、android层的修改
主要是修改kl文件，加入键值对应关系，这里要注意键值的命名以及，要与linux中的功能码对应上
device/rockchip/rksdk/20050030_pwm.kl
.......
key 28 ENTER
key 116 POWER WAKE
key 158 BACK
key 139 MENU
key 217 SEARCH
key 232 DPAD_CENTER
key 108 DPAD_DOWN
key 103 DPAD_UP
key 102 HOME
key 105 DPAD_LEFT
key 106 DPAD_RIGHT
key 115 VOLUME_UP
key 114 VOLUME_DOWN
key 143 NOTIFICATION WAKE
key 113 VOLUME_MUTE
key 388 F3
key 400 TV_MEDIA_MULT_BACKWARD
key 401 TV_MEDIA_MULT_FORWARD
key 402 TV_MEDIA_PLAY_PAUSE
key 64 TV_MEDIA_PLAY
key 65 TV_MEDIA_PAUSE
key 66 TV_MEDIA_STOP
key 67 TV_MEDIA_REWIND
key 68 TV_MEDIA_FAST_FORWARD
key 87 TV_MEDIA_PREVIOUS
key 88 TV_MEDIA_NEXT
key 141 SETTINGS
java
最后就是java文件的修改
frameworks/base/core/java/android/view/KeyEvent.java
.......
/** Key code constant: '1' key. */
public static final int KEYCODE_1 = 8;
/** Key code constant: '2' key. */
public static final int KEYCODE_2 = 9;
/** Key code constant: '3' key. */
public static final int KEYCODE_3 = 10;
/** Key code constant: '4' key. */
public static final int KEYCODE_4 = 11;
/** Key code constant: '5' key. */
public static final int KEYCODE_5 = 12;
/** Key code constant: '6' key. */
public static final int KEYCODE_6 = 13;
/** Key code constant: '7' key. */
public static final int KEYCODE_7 = 14;
/** Key code constant: '8' key. */
public static final int KEYCODE_8 = 15;
/** Key code constant: '9' key. */
public static final int KEYCODE_9 = 16;
/** Key code constant: '*' key. */
public static final int KEYCODE_STAR = 17;
/** Key code constant: '#' key. */
public static final int KEYCODE_POUND = 18;
......
其中的键值名称除去KEYCODE_后要与kl文件中的相同
上层键值表的查看
我们可以在以下文件中查看上层定义的键值关系表
development/ndk/platforms/android-9/include/android/keycodes.h
.........
enum {
AKEYCODE_UNKNOWN = 0,
AKEYCODE_SOFT_LEFT = 1,
AKEYCODE_SOFT_RIGHT = 2,
AKEYCODE_HOME = 3,
AKEYCODE_BACK = 4,
AKEYCODE_CALL = 5,
AKEYCODE_ENDCALL = 6,
AKEYCODE_0 = 7,
AKEYCODE_1 = 8,
AKEYCODE_2 = 9,
AKEYCODE_3 = 10,
AKEYCODE_4 = 11,
AKEYCODE_5 = 12,
AKEYCODE_6 = 13,
AKEYCODE_7 = 14,
AKEYCODE_8 = 15,
AKEYCODE_9 = 16,
AKEYCODE_STAR = 17,
AKEYCODE_POUND = 18,
AKEYCODE_DPAD_UP = 19,
AKEYCODE_DPAD_DOWN = 20,
AKEYCODE_DPAD_LEFT = 21,
AKEYCODE_DPAD_RIGHT = 22,
AKEYCODE_DPAD_CENTER = 23,
AKEYCODE_VOLUME_UP = 24,
AKEYCODE_VOLUME_DOWN = 25,
AKEYCODE_POWER = 26,
AKEYCODE_CAMERA = 27,
.......
其他
以下网址为android键值关系表 可以查阅下
Android KeyCode列表